In other CBS news, Grant Show and Lennon Parham join Jenna Elfman's comedy "Accidentally on Purpose" as her boss and younger sister, respectively. Jon Foster and Ashley Jensen were previously added.

Also, in "Big D," about a couple that moves back to the husband's hometown of Dallas, Kellen Coleman will play the man's younger sister, while Nat Faxton will play a cousin. Chris Parnell, Missi Pyle and Deanne Dunagan were already in.